{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "18181",
    "entityType": "User",
    "nonce": "0x6c4c7b757ad2e7a2fbfb4c06bcf8752727cbc69bf46a0ec3fb39d08db2605416",
    "signature": "0xcf65f5032bc884d1333c7ae8013ad95a4b48d27bd693d178bd3e360e9e2d1ebe4deb6f232f65ef75233d4d67d2827c0f54a2b34168eb6ddb7fd128374d718cac1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}